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QED

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QED¹

  • /ˌkjuːiːˈdiː/ UK
  • /ˌkjuˌiˈdi/ US

Where it comes from

From q(uantum) e(lectro)d(ynamics).

noun

  1. uncountable (Partial) initialism of quantum electrodynamics. QCD is a theory of quark interactions much analogous to QED: the interaction is carried by "gluons" (analogous to photons) which couple to the "color" (analogous to charge) of the quarks.

QED²

  • /ˌkjuːiːˈdiː/ UK
  • /ˌkjuˌiˈdi/ US

Where it comes from

See Q.E.D.

phrase

  1. alternative Alternative form of Q.E.D.; Initialism of quod erat demonstrandum. [A]fter the ſame manner S and U are proved to be equal, therefore the ſquare of CB is equal to the ſquare of the 2 other ſides QED.

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MLA

"QED." Wiktionary, via Micwyn, micwyn.com/word/qed. Accessed 6 Nov. 2026.

APA

QED. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/qed

Chicago

"QED." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/qed.

BibTeX
@misc{qed_2026,
  title = {QED},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/qed},
  urldate = {2026-11-06}
}